Iida Yrjö-Koskinen (née Petander; 1857–1937) was a Finnish politician, teacher and journalist, who served as a Member of the Parliament of Finland between 1909 and 1919, first representing the Finnish Party and later the National Coalition Party.

[1][2] Her parliamentary career included the period leading to, and declaring, Finland's independence.

[2] She was also an elector in the 1925 Finnish presidential election.

[1] She dedicated her career to improving women's rights and education, and the welfare of underprivileged people.

[2] In 1884, she married Freiherr Eino Sakari Yrjö-Koskinen [fi], which gave her the noble title of Freiherrin (Finnish: Vapaaherratar).